README

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This file contains instructions for replicating "The Effects of Certain and Uncertain Incentives on Effort and Knowledge Accuracy."
Thomas Jamieson and Nicholas Weller
Journal of Experimental Political Science
June 2019

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Codebook: 

Full details of the text and coding scheme for all questions in the survey are provided in Appendix A in the online appendix.

* treatment: treatment received by participant; 0 = control condition, 1 = bonus treatment; 2 = random bonus treatment; 3 = lottery treatment

* p_correct: knowledge accuracy score: number of correct answers out of 5 knowledge accuracy questions; range 0 to 5

* k_correct: baseline political knowledge score: number of correct answers out of 10 knowledge questions: range 0 to 10

* minutes: time spent on survey in minutes; range 2.3 to 47.983

* democrat: political identification as a Democrat; 0 = no, 1 = yes

* republican: political identification as a Republican; 0 = no, 1 = yes

* ideology: self-placement on a 7-point likert scale for political ideology; 1 = extremely liberal, 2 = liberal, 3 = slightly liberal; 4 = moderate, middle of the road, 5 = slightly conservative, 6 = conservative, 7 = extremely conservative

* moderate_3: politically moderate; 0 = participant indicated <3 or >5 on political ideology scale, 1 = participant indicated 3, 4, or 5 on political ideology scale

coded according to self-placement on political ideology scale 

* rep_agreement: level of agreement with the Republican Party; range 0 to 100

* dem_agreement: level of agreement with the Democratic Party; range 0 to 100

* education: highest level of school completed; 0 = did not graduate high school, 1 = high school graduate, 2 = some college, no degree, 3 = associate degree, 4 = bachelor's degree, 5 = master's degree, 6 = professional or doctorate degree

* income: total annual household income; 1 = under $25,000, 2 = between $25,000 and $49,999, 3 = between $50,000 and $74,999, 4 = between $75,000 and $99,999, 5 = between $100,000 and $124,999, 6 = between $125,000 and $149,999, 7 = over $150,000 (7)

* male: current gender identity; 0 = identify as female, transgender, or no category, 1 = identify as male

* politicalinterest: level of interest and following of government and public affairs; 0 = hardly at all, 1 = only now and then, 2 = some of the time, 3 = most of the time, 4 = always

* newsconsumption: level of news consumption; 0 = hardly at all, 1 = only now and then, 2 = some of the time, 3 = most of the time, 4 = always

* sq_total: total number of correct answers to screening questions out of 2; 0 = none correct; 1 = 1 correct; 2 = 2 correct

* rel_attendance: how often participant attends religious services; 0 = never, 1 = once a year or less, 2 = a few times a year, 3 = once or twice a month, 4 = once a week, 5 = more than once a week

* white: if participant identified as having a white racial background; 0 = no, 1 = yes

* black: if participant identified as having a black or African-American racial background; 0 = no, 1 = yes

* hisp: if participant identified as having a Hispanic or Latino racial background; 0 = no, 1 = yes

* startdate

* enddate

